The asymmetric ligands, 3-aminopropyl(aryl)tellurides (la, lb) [At = Ph (a); C,H,-OMe (b)] and 3- aminopropyl(phenyl)selenide (2)
and their complexes with platinum(U) and palladium(U), viz. [PtCl,(la, lb)] (3, 41, [PtCl,(2)] (5), [PdCl,(la, lb)] (6, 71, [PdC12(2)] (81,
[(Me)ClPd(lb)] (9) and [(Me)ClPd(lb),](lO) h ave been made and characterized. Complexes 3-8, have square planar geometry around the
metal (Pd or Pt) with the (Te,N)- or (Se,N)-ligand coordinated in a bidentate mode and the two chlorines cis to each other. Complex 9
also has a square planar geometry, with Me trans to nitrogen and Cl trans to tellurium. In complex 10 where Pd appears to be in a square
planar geometry the two tellurium atoms are judged to be trans to each other.